linux-kernel - Re: [PATCH v2 2/2] interconnect: qcom: add a driver for sa8775p

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Message-ID: <CAMRc=MfnBF3Bnez7w+twmn8bzCk3HRRSq69mJ3NpSrQeQqpPDA@mail.gmail.com>
Date:   Fri, 20 Jan 2023 10:09:53 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Georgi Djakov <djakov@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shazad Hussain <quic_shazhuss@...cinc.com>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v2 2/2] interconnect: qcom: add a driver for sa8775p

On Wed, Jan 18, 2023 at 3:45 PM Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
>
>
>
> On 18.01.2023 15:08, Bartosz Golaszewski wrote:
> > From: Shazad Hussain <quic_shazhuss@...cinc.com>
> >
> > Introduce QTI SA8775P-specific interconnect driver.
> >
> > Signed-off-by: Shazad Hussain <quic_shazhuss@...cinc.com>
> > [Bartosz: made the driver ready for upstream]
> > Co-developed-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> > ---
> >  drivers/interconnect/qcom/Kconfig   |    9 +
> >  drivers/interconnect/qcom/Makefile  |    2 +
> >  drivers/interconnect/qcom/sa8775p.c | 2541 +++++++++++++++++++++++++++
> >  3 files changed, 2552 insertions(+)
> >  create mode 100644 drivers/interconnect/qcom/sa8775p.c
> >
> > diff --git a/drivers/interconnect/qcom/Kconfig b/drivers/interconnect/qcom/Kconfig
> > index cd689b782f97..3132a03ca974 100644
> > --- a/drivers/interconnect/qcom/Kconfig
> > +++ b/drivers/interconnect/qcom/Kconfig
> > @@ -92,6 +92,15 @@ config INTERCONNECT_QCOM_RPMH_POSSIBLE
> >  config INTERCONNECT_QCOM_RPMH
> >       tristate
> >
> > +config INTERCONNECT_QCOM_SA8775P
> > +     tristate "Qualcomm SA8775P interconnect driver"
> > +     depends on INTERCONNECT_QCOM_RPMH_POSSIBLE
> > +     select INTERCONNECT_QCOM_RPMH
> > +     select INTERCONNECT_QCOM_BCM_VOTER
> > +     help
> > +       This is a driver for the Qualcomm Network-on-Chip on sa8775p-based
> > +       platforms.
> > +
> >  config INTERCONNECT_QCOM_SC7180
> >       tristate "Qualcomm SC7180 interconnect driver"
> >       depends on INTERCONNECT_QCOM_RPMH_POSSIBLE
> > diff --git a/drivers/interconnect/qcom/Makefile b/drivers/interconnect/qcom/Makefile
> > index 3fd4c2713c4a..75df2cf64c0b 100644
> > --- a/drivers/interconnect/qcom/Makefile
> > +++ b/drivers/interconnect/qcom/Makefile
> > @@ -13,6 +13,7 @@ qnoc-qcm2290-objs                   := qcm2290.o
> >  qnoc-qcs404-objs                     := qcs404.o
> >  qnoc-qdu1000-objs                    := qdu1000.o
> >  icc-rpmh-obj                         := icc-rpmh.o
> > +qnoc-sa8775p-objs                    := sa8775p.o
> >  qnoc-sc7180-objs                     := sc7180.o
> >  qnoc-sc7280-objs                        := sc7280.o
> >  qnoc-sc8180x-objs                    := sc8180x.o
> > @@ -39,6 +40,7 @@ obj-$(CONFIG_INTERCONNECT_QCOM_QCM2290) += qnoc-qcm2290.o
> >  obj-$(CONFIG_INTERCONNECT_QCOM_QCS404) += qnoc-qcs404.o
> >  obj-$(CONFIG_INTERCONNECT_QCOM_QDU1000) += qnoc-qdu1000.o
> >  obj-$(CONFIG_INTERCONNECT_QCOM_RPMH) += icc-rpmh.o
> > +obj-$(CONFIG_INTERCONNECT_QCOM_SA8775P) += qnoc-sa8775p.o
> >  obj-$(CONFIG_INTERCONNECT_QCOM_SC7180) += qnoc-sc7180.o
> >  obj-$(CONFIG_INTERCONNECT_QCOM_SC7280) += qnoc-sc7280.o
> >  obj-$(CONFIG_INTERCONNECT_QCOM_SC8180X) += qnoc-sc8180x.o
> > diff --git a/drivers/interconnect/qcom/sa8775p.c b/drivers/interconnect/qcom/sa8775p.c
> > new file mode 100644
> > index 000000000000..da21cc31a580
> > --- /dev/null
> > +++ b/drivers/interconnect/qcom/sa8775p.c
> > @@ -0,0 +1,2541 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Copyright (c) 2021-2022, Qualcomm Innovation Center, Inc. All rights reserved.
> > + * Copyright (c) 2023, Linaro Limited
> > + */
> > +
> > +#include <linux/device.h>
> > +#include <linux/interconnect.h>
> > +#include <linux/interconnect-provider.h>
> > +#include <linux/module.h>
> > +#include <linux/of_platform.h>
> > +#include <dt-bindings/interconnect/qcom,sa8775p-rpmh.h>
> > +
> > +#include "bcm-voter.h"
> > +#include "icc-rpmh.h"
> > +
> > +#define SA8775P_MASTER_GPU_TCU                               0
> Other drivers move these to socname.h
>

Why would they do it if the symbols are not meant to be used outside
of the driver?

> Otherwise, this lgtm:
>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
>

[...]

Bart